Syntheses of Optically Active Trifluoronorcoronamic Acids
作者:Toshimasa Katagiri、Minoru Irie、Kenji Uneyama
DOI:10.1021/ol0059955
日期:2000.8.1
Syntheses of opticallyactive trifluoronorcoronamic acid 6 and its diastereomer 9 are described. Highly stereospecific and diastereoselective S(N)2 cyclization of gamma-cyanohydrins 3a and 3b gave cyclopropyl nitriles 4a and 4b. Hydrolysis of the cyano group and deprotection of the amino group of 4a provide trifluoronorcoronamic acid 6. Hofmann rearrangement of the amide which was generated by hydrolysis